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R. B. HENDERSON AND R. E. JAMES. BEFRIGERATING APPARATUS.

APPLICATION FILED MAYI3, 1918.

1,339,622. I v Patented May 11, 1920.

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REFRIGERATING APPARATUS.

APPLICATION FILED MAYlE-i, 191a.

1,339, 92 Pmwa'Ma 11,1920.

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ROIBERT IB. HENDERSON AND ROBERT E. JAMES, OF OKLAHOMA, OKLAHOMA; SAID HENDERSON ASSIGNOR TO SAID JAMES.

REFRIGERATING APPARATUS.

Application filed May 13, 1918.

To all ie/mm it may concern Be it known that we, Roenirr B. HENDER- son and ROBERT E. James, both citizens of the United States, both residing at Oklahoma city, in the county of Oklahoma and State of Oklahoma, have invented certain new and useful Improvements in Refrigerating Apparatus, of which the following is a specification.

This invention relates to improvements in ice-making and refrigerating apparatus of the absorption type in which the refrigerating is driven from a solution by means of heat and then condensed, after which it is allowed to expand and reenter into solution, the desired pressure and vacuum being obtained solely by the application and withdrawal of heat from the refrigerating gas.

The object of the invention is to provide an improved apparatus of compact and convenient design whereby the operation of the device is simplified and its use made spe cially applicable for domestic purposes or small refrigerating establishments.

Referring to the accompanying drawingsz- Figure 1 shows a longitudinal section of our apparatus.

Fig. 2 shows a side elevation thereof.

Fig. 3 represents a transverse section on the line 3-3 of Fig. 1..

Fig. el shows a detail of a check valve which we may employ.

Referring now more particularly to the drawings, 1 represents a generator cylinder having end pieces 2, provided with glands 3. Within the generator cylinder 1 is a cooling device 4:, such as a coil connected with a pipe 5, passing through one of the glands 3, and connecting to a source of cold water supply 6, through a valve 7. Beneath the generator '1. is a suitable heater or burner 8. Leading from the cylinder 1 are pipes 9 and 10 which communicate with a cylindrical gas receiving chamber 11, through. which passes a cold water pipe 12. For preventing the escape of gases from the cylinder 11, we provide glands 14 through Specification of Letters Patent.

Patented May 11, 1920.

Serial No. 234,111.

is a pipe 17, communicating with the condenser chamber 18 through globe valve 19 and check valve 20. The check valve 20 is so constructed as to permit the passage of gases from the chamber 11 into the condenser 18 but which will not permit the flow of gases in the-reverse direction. Passing through the condenser 18 is a pipe 21 connected with the source of cold water supply 6 through the globe valve 22. The opposite end of the pipe 21 is connected with the pipe 12 in the chamber 11 by means of pipe 24. Water flowing from the source of cold water supply 6 passes through the valve 22 into the pipe 21, thence into the pipe 24:, through pipe 12, and out of the drain 25. The cooling coil 4 in the chamher 1 is likewise connected with the drain 25 through pipes 26 and 27. It will thus be seen that there are two independent cooling circuits.

Leading from the condenser chamber 18 is a pipe 28 having a globe valve 29 therein. The pipe 28 communicates with a freezing coil. in any desired cooling chamber A such as a brine tank or refrigerator through the expansion valve 31. The freezing coil 30 is connected with the cylinder 1 by means of the pipe 32, check valve 3& and pipe The check valve 3% may be of any preferred construction, as for instance, one of the type shown in Fig. d, and is so constructed as to permit the flow of gases from the cooling coil into the cylinder 1 but to prevent the passage of gas in the reverse direction.

For introducing and withdrawing material from the cylinder 1, we provide a pipe having a globe valve 36 for controlling the flow of materials therethrough.

In constructing our'device the cylinders are arranged horizontally one above the other and as close together as convenient. W e prefer to support the cylinder 1 on suitable legs 37. A vertical support 38 secured to the cylinder 'l'is provided for holding the cylinder 18 in position.

In operation water is supplied to the cylinder 1 until it is preferably about onethird full. In practice, we prefer to use a solution of salt and water. Ammonia gas under pressure is then injected through the pipe 85 and valve 36 where it enters into solution with the water. In a commercial apparatus of convenient size we prefer to employ approximately 17 gallons of water, 1 pound of common salt and pounds of ammonia gas. he bulk of the water is in creased to a very considerable extent by the addition of the ammonia gas.

After the cylinder 1 has been charged with the ammonia solution heat is applied from the burner 8 or in any other preferred. manner, whereby the ammonia gas in solution is driven oh and collects in the chambers 1 and 11. At this time the valves 19 and 22 are open, and the valves 7 and 29 are closed. The heating is continued until a sufficient pressure is reached, as indicated by the gage 16, care being taken to keep the temperature of the water below boiling. In the commercial apparatus above referred to, the pressure desired would be about 225 pounds. At this time the cold water valve 7 is opened allowing the water in the cylinder 1 to be cooled, and the application of heat is simultaneously discontinued. The cold water valve 22, and the valve 19 are closed. The valve 29 is now open to permit the liquid ammonia in the condenser 18 to pass into the freezing coil 30 through the pipe 28 and expansion valve 31. The expansion of the ammonia in the coil 30 absorbs the heat in the freezing chamber A in the manner well known in the art. The vacuum in the cylinder 1 is sufiicicntly low to cause the expanded gas to be drawn from the coil 30 back into solution in the cylinder 1, while the check valve 8 1 prevents the passage of any of the water or gas in the reverse direction.

The chamber .11 is of importance in that it insures of any water which might be vaporized being returned to the cylinder 1 instead of passing upwardly into the condenser 18 with the ammonia It is of further importance in that it permits of substantially all oi? the gas in the solution being driven ofl' without raising the pressure in the cylinder 1 to too great an extent whereby the solution need not be raised to such a high temperature.

\Ve have also found that the addition of salt to the solution very materially increases the amount of gases which may be driven from the solution.

lVe claim as our invention:

1. 'A refrigerating apparatus, comprising a enerating chamber, means for supporting the same, a dehydrating chamber above and supported by said generating chamber, a gas passage between said chambers, a water return between said chambers, a condenser, a connection between said dehydratin chamber and said condenser, a manually operable valve in said connection, an automatically operable check valve in said connection, a refrigerating coil connected to the condenser and adapted to periodically receive the refrigerant therefrom, means controlling the passage of the refrigerant thereto, a pi e extending substantially vertically downwartv from the generating chan'iber for conducting the refrigerant from the refrigerating coil to the generator, an automatically operable check valve in said pipe, means for heating and cooling the generating chamber, and independent means for sinmltaneously cooling the dehydrating chamber and condenser.

2. A refrigerating apparatus, comprising a generating chamber, means for support ing the same, a dehydrating chamber above and supported by said generating chamber, a gas passage between said chambers, a water return between said chambers, a condenser, a connection between said dehydrat ing chamber and said condenser, a manually operable said connection, an check valve in said coil connected to the col ed to periodically re 5 rei rig t therefrom, means controlling the passage of the re frigerant thereto, said generating chamber, dehydrating chamber, condenser and refrigerator being in substantially vertical alinemerit, a substantiall vertical pipe connect- :in the refrigerate" and generating chamber and having an automatically operable check valve therein, means for heating and cooling the generating chamber, and independent means for simultaneously cooling the dehydr: ng chamber and condenser.

ln testimony r-ihereo'i we have hereunto subscribed our names.

ROBER 13. ROBERT E. lVitnesses Jaiinn'r'r Toni),

H. B. Non'ron. 

